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A cross-country skier slides horizontally along the snow and comes to rest after sliding a distance of 28 m. If the coefficient of kinetic friction between her skis and the snow is ?k = 0.030, determine her speed at the start of the slide.
A 1025 kg car carrying four 78kg people travels over a rough "washboard" dirt road with corrugations 4m apart which causes the car to bounce on its spring suspension.
A 0.36-kg object connected to a light spring with a force constant of 24.4 N/m oscillates on a frictionless horizontal surface. Determine the maximum speed of the object
A 42.0 kg seal at an amusement park slides from rest down a ramp into the pool below. If the seal reaches the water with a speed of 4.30 m/s, what is the work done by kinetic friction
the pontential difference across the terminals of a battery is 8.4V when there is a current of 1.50A in the battery from the negative to the positive terminal. what is the emf of the battery
A 2.5-m-long steel wire in a musical instrument has a radius of 0.02 mm. When the wire is under a tension of 91 N, how much does its length change
A 14 g bullet travelling at 247 m/s is fired into a 0.459 kg wooden block anchored to a 100 N/m spring. How far is a spring compressed to the nearest thousandth of meter.
A spring has a force constant of 100 N/m and an unstretched length of .07 m. What is the centripetal force on the disc
An observer, whose eyes are 1.96 m above the ground, is standing 32.0 m away from a tree. How tall is the tree
A 1.94-cm-high object is placed 23.8 cm in front of a concave mirror with a 5.84-cm focal length. What is the position of the image
A baseball with a mass of 0.152 kg is moving horizontally at 32.0 m/s [E], when it is struck by a bat for 0.00200 seconds, Find the average net force of the ball
The moon is 3.85Ã-10^8 m from Earth, and it takes 27.3 days to orbit Earth. At what speed is the moon traveling relative to Earth
A radar unit sends out 0.05 microsecond pulses of microwaves whose wavelength is 25 mm. What is the frequency of these microwaves
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